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/*]]>*/</style><title>05. ThinkPHP 3.1.2 CURD特性</title></head><body>
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<div><span style="font-family: 微软雅黑; font-size: 14pt; font-weight: bold; line-height: 240%">本节课大纲：</span></div>
<div><span style="font-family: 微软雅黑; font-size: 12pt; line-height: 240%">一、ThinkPHP 3 的CURD介绍 &nbsp;（了解）</span></div>
<div><span style="font-family: 微软雅黑; font-size: 12pt; line-height: 140%">二、ThinkPHP 3 读取数据 &nbsp; &nbsp;（重点）</span></div>
<div><span style="font-family: 微软雅黑; font-size: 9pt; line-height: 140%"> &nbsp; &nbsp; &nbsp; &nbsp;对数据的读取 </span><span style="font-family: 微软雅黑; font-size: 9pt; font-weight: bold; color: #ff0000; line-height: 140%">Read</span></div>
<div><span style="font-family: 微软雅黑; font-size: 9pt; line-height: 140%"> &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;$m=new Model(&apos;User&apos;);</span></div>
<div><span style="font-family: 微软雅黑; font-size: 9pt; line-height: 190%"> &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;$m=M(&apos;User&apos;);</span></div>
<div><span style="font-family: 微软雅黑; font-size: 9pt; line-height: 140%"> &nbsp; &nbsp; &nbsp; &nbsp;</span><span style="font-family: 微软雅黑; font-size: 9pt; font-weight: bold; color: #ff0000; line-height: 140%">select</span></div>
<div><span style="font-family: 微软雅黑; font-size: 9pt; line-height: 190%"> &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;$m-&gt;select();//获取所有数据，以数组形式返回</span></div>
<div><span style="font-family: 微软雅黑; font-size: 9pt; line-height: 140%"> &nbsp; &nbsp; &nbsp; &nbsp;</span><span style="font-family: 微软雅黑; font-size: 9pt; font-weight: bold; color: #ff0000; line-height: 140%">find</span></div>
<div><span style="font-family: 微软雅黑; font-size: 9pt; line-height: 190%"> &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;$m-&gt;find($id);//获取单条数据</span></div>
<div><span style="font-family: 微软雅黑; font-size: 9pt; line-height: 140%"> &nbsp; &nbsp; &nbsp; &nbsp;</span><span style="font-family: 微软雅黑; font-size: 9pt; font-weight: bold; color: #ff0000; line-height: 140%">getField</span><span style="font-family: 微软雅黑; font-size: 9pt; color: #000000; line-height: 140%">(字段名)//获取一个具体的字段值</span></div>
<div><span style="font-family: 微软雅黑; font-size: 9pt; line-height: 140%"> &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;$arr=$m-&gt;</span><span style="font-family: 微软雅黑; font-size: 9pt; font-weight: bold; color: #ff0000; line-height: 140%">where(&apos;id=2&apos;)</span><span style="font-family: 微软雅黑; font-size: 9pt; color: #000000; line-height: 140%">-&gt;getField(&apos;username&apos;);</span></div>
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<div><span style="font-family: 微软雅黑; font-size: 12pt; line-height: 140%">三、ThinkPHP 3 创建数据 &nbsp; &nbsp;（重点）</span></div>
<div><span style="font-family: 微软雅黑; font-size: 9pt; line-height: 140%"> &nbsp; &nbsp; &nbsp; &nbsp;对数据的添加 Create</span></div>
<div><span style="font-family: 微软雅黑; font-size: 9pt; line-height: 140%"> &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;$m=new Model(&apos;User&apos;);</span></div>
<div><span style="font-family: 微软雅黑; font-size: 9pt; line-height: 140%"> &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;$m=M(&apos;User&apos;);</span></div>
<div><span style="font-family: 微软雅黑; font-size: 9pt; line-height: 140%"> &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;</span><span style="font-family: 微软雅黑; font-size: 9pt; font-weight: bold; color: #ff0000; line-height: 140%">$m-&gt;字段名=值</span></div>
<div><span style="font-family: 微软雅黑; font-size: 9pt; line-height: 140%"> &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;$m-&gt;</span><span style="font-family: 微软雅黑; font-size: 9pt; font-weight: bold; line-height: 140%">add();</span></div>
<div><span style="font-family: 微软雅黑; font-size: 9pt; line-height: 140%"> &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;返回值是新增的</span><span style="font-family: 微软雅黑; font-size: 9pt; font-weight: bold; line-height: 140%">id号</span></div>
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<div><span style="font-family: 微软雅黑; font-size: 12pt; line-height: 140%">四、ThinkPHP 3 删除数据 &nbsp; &nbsp;（重点）</span></div>
<div><span style="font-family: 微软雅黑; font-size: 9pt; line-height: 140%"> &nbsp; &nbsp; &nbsp; &nbsp;$m=M(&apos;User&apos;);</span></div>
<div><span style="font-family: 微软雅黑; font-size: 9pt; line-height: 140%"> &nbsp; &nbsp; &nbsp; &nbsp;</span><span style="font-family: 微软雅黑; font-size: 9pt; font-weight: bold; color: #ff0000; line-height: 140%">$m-&gt;delete(2); </span><span style="font-family: 微软雅黑; font-size: 9pt; color: #000000; line-height: 140%"> &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;//删除id为2的数据</span></div>
<div><span style="font-family: 微软雅黑; font-size: 9pt; line-height: 140%"> &nbsp; &nbsp; &nbsp; &nbsp;$m-&gt;</span><span style="font-family: 微软雅黑; font-size: 9pt; font-weight: bold; color: #ff0000; line-height: 140%">where(&apos;id=2&apos;)</span><span style="font-family: 微软雅黑; font-size: 9pt; color: #000000; line-height: 140%">-&gt;delete(); //与上面效果相同，也是删除id为2的数据</span></div>
<div><span style="font-family: 微软雅黑; font-size: 9pt; line-height: 140%"> &nbsp; &nbsp; &nbsp; &nbsp;返回值是受影响行数</span></div>
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<div><span style="font-family: 微软雅黑; font-size: 12pt; line-height: 140%">五、ThinkPHP 3 更新数据 &nbsp; &nbsp;（重点）</span></div>
<div><span style="font-family: 微软雅黑; font-size: 9pt; line-height: 140%"> &nbsp; &nbsp; &nbsp; &nbsp;$m=M(&apos;User&apos;);</span></div>
<div><span style="font-family: 微软雅黑; font-size: 9pt; line-height: 140%"> &nbsp; &nbsp; &nbsp; &nbsp;$data[&apos;id&apos;]=1;</span></div>
<div><span style="font-family: 微软雅黑; font-size: 9pt; line-height: 140%"> &nbsp; &nbsp; &nbsp; &nbsp;$data[&apos;username&apos;]=&apos;ztz2&apos;;</span></div>
<div><span style="font-family: 微软雅黑; font-size: 9pt; line-height: 140%"> &nbsp; &nbsp; &nbsp; &nbsp;$m-&gt;</span><span style="font-family: 微软雅黑; font-size: 9pt; font-weight: bold; color: #ff0000; line-height: 140%">save($data)</span><span style="font-family: 微软雅黑; font-size: 9pt; color: #000000; line-height: 140%">; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; </span></div>
<div><span style="font-family: 微软雅黑; font-size: 9pt; line-height: 140%"> &nbsp; &nbsp; &nbsp; &nbsp;返回值是受影响行数</span></div>
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<div><span style="font-family: 微软雅黑; font-size: 9pt; line-height: 140%">++++++++++++++++++++++++++++++++++++++Leo++++++++++++++++++++++++++++++++++++++</span></div>
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<div><span style="font-family: 微软雅黑; font-size: 9pt; line-height: 140%">1. find, 查找单条数据</span></div>
<div><span style="font-family: 微软雅黑; font-size: 9pt; line-height: 140%"> &nbsp; &nbsp; &nbsp; &nbsp;$m-&gt;find() &nbsp;//返回id为1的数据</span></div>
<div><span style="font-family: 微软雅黑; font-size: 9pt; line-height: 140%"> &nbsp; &nbsp; &nbsp; &nbsp;$m-&gt;find(2) //返回id为2的数据</span></div>
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<div><span style="font-family: 微软雅黑; font-size: 9pt; line-height: 140%">2. 连贯操作</span></div>
<div><span style="font-family: 微软雅黑; font-size: 9pt; line-height: 140%"> &nbsp; &nbsp; &nbsp; &nbsp;$m-&gt;getField(&apos;username&apos;) //默认也是获取id为1的&apos;username&apos;字段的值</span></div>
<div><span style="font-family: 微软雅黑; font-size: 9pt; line-height: 140%"> &nbsp; &nbsp; &nbsp; &nbsp;$m-&gt;where(&apos;id=2&apos;)-&gt;getField(&apos;username&apos;) &nbsp; &nbsp; &nbsp; &nbsp;//获取id为2的&apos;username&apos;字段的值</span></div>
<div><span style="font-family: 微软雅黑; font-size: 9pt; line-height: 140%"> &nbsp; &nbsp; &nbsp; &nbsp;或$m-&gt;where(2)-&gt;getField(&apos;username&apos;) //此处与直接getField(&apos;username&apos;)一样，where没起作用</span></div>
<div><span style="font-family: 微软雅黑; font-size: 9pt; line-height: 140%"> &nbsp; &nbsp; &nbsp; &nbsp;两个-&gt; ： 连贯操作</span></div>
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<div><span style="font-family: 微软雅黑; font-size: 9pt; line-height: 140%">3. 没有让模板显示，则trace信息没有</span></div>
<div><span style="font-family: 微软雅黑; font-size: 9pt; line-height: 140%"> &nbsp; &nbsp; &nbsp; &nbsp;若注释$-&gt;display()，则trace没有</span></div>
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